Conceptual Physics (12th Edition)

by
Hewitt, Paul G.

Published by
Addison-Wesley

ISBN 10:
0321909100

ISBN 13:
978-0-32190-910-7

Chapter 23 - Think and Explain: 68

Answer

Circuit 5.

Work Step by Step

Of the circuits, only #5 is a complete loop.
Circuits 1 and 2 connect the positive terminal to the negative terminal with a wire. This is known as a short circuit and will result in a large current that will drain the battery.
Circuit 3 has each end of the lightbulb filament connected to one battery terminal, which places both ends of the filament at the same potential. No current will be driven.
Circuit 4 has only one end of the lightbulb filament connected. The glass bulb will not conduct.